Beauty in a bug?

I must confess that I haven't checked who provided the core implementation of partition-by (presumably Rich). But whoever it was: he clearly knows what he's doing.

However there is still a bug spoiling the show a little bit. The investigations lead us directly to the basic question of how partition-by should behave.

What is the value of elegance?

And what is elegance anyway? Of course this is a subjective topic. So I can only speak about my own sense of aesthetics. A recent thread on the clojure google group had some examples which touched me exactly there—at my aesthetic sense.